{
STIHL BT 45
Instruction Manual
Manual de instrucciones
WARNING
Read Instruction Manual thoroughly before use and follow all safety precautions – improper use can cause serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones – el uso incorrecto puede causar lesiones graves o mortales.
Instruction Manual 1 - 33
Manual de instrucciones 34 - 71
English
Contents
Printing inks contain vegetable oils, paper can be recycled.
Printed on chlorine-free paper Original Instruction Manual
© ANDREAS STIHL AG & Co. KG, 2015 0458-421-8621-A. VA2.L14. 0000000420_010_GB
Guide to Using this Manual |
2 |
Safety Precautions and Working |
|
Techniques |
2 |
Mounting the Handles |
11 |
Using the Unit |
12 |
Fuel |
13 |
Fueling |
14 |
Gearbox |
18 |
Fitting the Auger |
18 |
Starting / Stopping the Engine |
19 |
Operating Instructions |
21 |
Releasing a Trapped Auger |
21 |
Cleaning the Air Filter |
22 |
Engine Management |
22 |
Adjusting the Carburetor |
23 |
Spark Plug |
24 |
Engine Running Behavior |
25 |
Rewind Starter |
25 |
Storing the Machine |
25 |
Maintenance and Care |
26 |
Main Parts |
28 |
Specifications |
29 |
Maintenance and Repairs |
30 |
Disposal |
30 |
STIHL Incorporated Federal |
|
Emission Control Warranty |
|
Statement |
31 |
Trademarks |
33 |
Allowonlypersonswhofullyunderstand this manual to operate your power drill.
To receive maximum performance and satisfactionfromyourSTIHLpower drill, it is important that you read, understand and follow the safety precautions and the operating and maintenance instructions in chapter "Safety Precautions and Working Techniques" before using your power drill. For further information you can go to www.stihlusa.com
Contactyour STIHLdealer or theSTIHL distributor for your area if you do not understandanyoftheinstructionsinthis manual.
WARNING
Because a power drill is a high-torque, gasoline-powered tool, some special safety precautions must be observed to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury.
{This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems.
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1 |
English
Guide to Using this Manual
Pictograms
The meanings of the pictograms attached to or embossed on the machine are explained in this manual.
Dependingonthemodelconcerned,the following pictograms may be on your machine.
Fuel tank for gasoline and engine oil mixture
Press to operate manual fuel pump
Auger brake
Symbols in Text
Many operating and safety instructions are supported by illustrations.
The individual steps or procedures describedinthe manualmaybe marked in different ways:
N A bullet marks a step or procedure.
A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. Example:
N Loosen the screw (1). N Lever (2) ...
2
In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols and signal words described below:
DANGER
Indicates an imminent risk of severe or fatal injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in severe or fatal injury.
NOTICE
Indicates a risk of property damage, including damage to the machine or its individual components.
Engineering Improvements
STIHL’s philosophy is to continually improve all of its products. As a result, engineeringchangesandimprovements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in this manual. If the operating characteristics or the appearance of your machine differs from those describedinthismanual,pleasecontact your STIHL dealer or the STIHL distributor for your area for assistance.
Safety Precautions and
Working Techniques
Because a power drill is a high-torque, gasolinepowered tool, some spe-
cial safety precautions must be observed to reduce the risk of per- sonal injury.
It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety precautions periodically. Careless or improper use may cause serious or fatal injury.
Have your STIHL dealer show you how to operate your power tool. Observe all applicable local safety regulations, standards and ordinances.
DANGER
Drilling into or contact with electrical wires may
cause severe shock,
burns or death. See "Working Conditions" below.
WARNING
Striking a hard object in the earth with the turning auger and the resulting slowing or stopping of the auger creates reactiveforces.Thetransferofrotational (reactive) forces can cause the auger powerhead and handles to rotate suddenlyinacounterclockwisedirection
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andcanresultinlossof controlorcause the handle to hit the operator or throw him to the ground, resulting in serious injury.
WARNING
Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.
WARNING
The use of this machine may be hazardous. If the drilling tool comes in contact with your body, it could cause impact or cut injuries.
Use your wood boring drill only for drilling wood. Use your planting auger only for mass flower plantings, small decorative posts, sign holes or deep road fertilization. For use in existing flower beds. Use your ice auger only for drilling holes in ice (with ice auger attachments).
WARNING
Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine.
WARNING
Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use.
WARNING
Toreducetheriskofinjurytobystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it.
Most of these safety precautions and warnings apply to the use of all STIHL power drills. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model.
Safe use of a wood boring drill or a plant auger involves
1.the operator
2.the power tool
3.the use of the power tool.
THE OPERATOR
Physical Condition
You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued.
WARNING
Be alert – if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous.Ifyouhaveanyconditionthat
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mightbeaggravatedbystrenuouswork, check with your doctor before operating this power tool.
WARNING
Prolonged use of a power tool (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome.
These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis.
All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of exposure to vibration are mentioned as factorsinthedevelopmentofwhitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following:
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Most STIHL power tools are available with an anti-vibration ("AV") system designed to reduce the transmission of vibrations created by the machine to the operator's hands. An AV system is recommended for those persons using power tools on a regular or sustained basis.
–Wear gloves and keep your hands warm.
–Keep the AV system well maintained. A power tool with loose components or with damaged or worn AV elements will tend to have higher vibration levels.
–Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressure. Take frequent breaks.
All the above-mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore, continual and regular users should closely monitor the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately.
WARNING
The ignition system of the STIHL unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with a pacemaker should consult their physician and the pacemaker manufacturer before operating this tool.
Proper Clothing
WARNING
To reduce the risk of injury, the operator should wear proper protective apparel.
WARNING
To reduce the risk of injury to your eyes never
operate your power tool unless wearing goggles or properly fitted protec- tive glasses with adequate top and side protection complying with ANSI Z87 "+" (or your applicable national standard).
Power tool noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly.
Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.
Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Wear overalls or long pants made of heavy material to help protect your legs. Do not wear shorts, sandals or go barefoot.
Avoid loose-fitting jack- ets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level.
Good footing is very important. Wear sturdy boots with nonslip soles. Steel-toed safety boots are recommended.
Wear an approved safety hard hat to reduce the risk of injury to your head when there is a danger of head injuries.
Always wear heavy duty work gloves (e.g. made of leather or other wear resistant material) when handling the machine and the drilling tool. Heavy-duty, nonslip gloves improve your grip and help to protect your hands.
THE POWER TOOL
For illustrations and definitions of the power tool parts see the chapter on "Main Parts."
4 |
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WARNING
Nevermodifythispowertoolinanyway. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments, drills and augers are useable with STIHL power tools, their use may, in fact, be extremely dangerous.
If this tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuingwork.Checkinparticularthat the fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. Incaseofdoubt,haveitcheckedbyyour STIHL servicing dealer.
THE USE OF THE POWER TOOL
Transporting the Power Tool
WARNING
Always stop the engine before putting the power drill down or carrying it. Carrying a power drill with the engine running is dangerous. Accidental accelerationoftheenginecancausethe drilling tool to rotate.
WARNING
Duringoperation,thepowerheadmuffler and the material around it reach extremely high temperatures. Avoid
setting down a hot unit onto dry, flammable material, or touching the hot muffler, you could receiveserious burns.
Carry the power drill with the drilling tool pointingdownorusingacarrystrapwith thedrilling toolpointingtothe rear– with the hot muffler away from your body.
Remove the drilling tool before transporting the power tool long distances.
When transporting in a vehicle, properly secure your power tool to prevent turnover, fuel spillage and damage.
Whenthepowertoolisnotinuse,shutit offandputitdownsoitcannotendanger others.
Fuel
Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on "Fuel" of your instruction manual).
WARNING
Gasoline is an extremely flammable fuel. If spilled and ignited by a spark or other ignition source, it can cause fire and seri-
ous burn injury or property damage. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the power tool. Note that combusti- ble fuel vapor may escape from the fuel system.
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Fueling Instructions
WARNING
Fuel your power tool in well-ventilated areas, outdoors. Always shut off the engine and allow it to cool before refueling. Gasoline vapor pressure may build up inside the fuel tank depending on the fuel used, the weather conditions and the tank venting system.
In order to reduce the risk of burns and other personal injury from escaping gas vapor and fumes, remove the fuel filler cap onyour power toolcarefullysoas to allow any pressure build-up in the tank toreleaseslowly. Never remove thefuel filler cap while the engine is running.
Selectbaregroundforfueling andmove at least 10 feet (3 m) from the fueling spot before starting the engine. Wipe off any spilled fuel before starting your machine.
WARNING
Check for fuel leakage while refueling and during operation. If fuel leakage is found, do not start or run the engine until the leak is fixed and any spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.
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WARNING
Inordertoreducetheriskoffuelspillage and fire from an improperly tightened fuel cap, correctly position and tighten the fuel cap in the fuel tank opening.
Different models may be equipped with different fuel caps.
Toolless cap with grip
001BA220 KN
To do this with this STIHL cap, raise the griponthetopofthecapuntilitisupright at a 90° angle. Insert the cap in the fuel tank opening with the raised positioning marks on the grip of the cap and on the fuel tank opening lining up. Using the grip, press the cap down firmly while turning it clockwise as far as it will go (approx. 1/4 turn).
Fold the grip flush with the top of the cap. Grip 
the cap and check for tightness. If the grip does not lie completely flush
with the cap and the detent on the grip does not fit in the correspond- ing recess in the filler opening, or if the cap is loose in the filler opening, the cap is not properly seated and tightened and you must repeat the above steps.
Misaligned, damaged or broken cap
NIfthecapdoesnotdropfullyintothe openingwhenthepositioningmarks line up and/or if the cap does not tighten properly when twisted, the baseofthecapmaybeprematurely rotated (in relation to the top) to the closed position. Such misalignment can result from handling, cleaning or an improper attempt at tightening.
001BA227 KN |
Left: |
Base of cap in closed posi- |
|
tion (with open space) |
Right: |
Base of cap correctly posi- |
|
tioned for installation |
001BA226 KN |
NTo return the cap to the open position for installation, turn the cap (with the grip up) until it drops fully intothetankopening.Next,twistthe capcounterclockwiseasfarasitwill go (approx. 1/4 turn) – this will twist the base of the cap into the correct position. Then, twist the cap clockwise, closing it normally.
NIf your cap still does not tighten properly, it may be damaged or broken; immediately stop use of the unit and take it to your authorized STIHL dealer for repair.
Screw Cap
WARNING
Unit vibrations can cause an improperly tightened fuel filler cap to loosen or
come off and spill quanti- ties of fuel. In order to reduce the risk of fuel spillage and fire, tighten the fuel filler cap by hand as securely as possible.
See also the "Fueling" chapter in your Instruction Manual for additional information.
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Before Starting
WARNING
Alwayscheckyour power toolforproper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and drilling tool or auger. The throttle trigger must move freely and always spring back to the idle position. Never attempt to modify the controls or safety devices. Regularmaintenanceisimportantinthis respect. Check the condition and the tightness of the drilling tool.
WARNING
Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections,manual fuelpump (onlyfor powertoolsequippedwithamanualfuel pump). Do not start the engine if there are leaks or damage – risk of fire! Have the machine repaired by a servicing dealer before using it.
WARNING
Never operate your power tool if it is damaged, improperly adjusted or maintained, or not completely or securely assembled.
WARNING
Check that the spark plug boot is securely mounted on the spark plug – a loose boot may cause arcing that could ignite combustible fumes and cause a fire.
Keep the handles clean and dry at all times; it is particularly important to keep themfreeofmoisture,pitch,oil,fuelmix,
grease or resin in order for you to maintain a firm grip and properly control your power tool.
Starting
Start the engine at least 10 feet (3 m) from the fueling spot, outdoors only.
421BA001 KN |
Forspecificstartinginstructions,seethe appropriate section of your manual. Place the power tool on firm ground or other solid surface in an open area. Maintain good balance and secure footing.
WARNING
Your power drill should be started only when it is held steady by the operator.
WARNING
To reduce the risk of loss of control, be surethatthepowerdrillgearissetinthe neutral position N. When the engine starts at starting throttle, engine speed will be fast enough for the clutch to engage and, if the gear is not set in the neutral position, turn the drilling tool.
Once the engine has started, immediately blip the throttle trigger, whichshouldreleasethestartingthrottle and allow the engine to slow down to idle.
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WARNING
Your power tool is a one-person machine. Do not allow other persons in the general work area, even when starting.
WARNING
To reduce the risk of injury from loss of control, do not attempt to "drop start" your power tool.
WARNING
When you pull the starter grip, do not wrap the starter rope around your hand. Do not let the grip snap back, but guide the starter rope to rewind it properly. Failure to follow this procedure may result in injury to your hand or fingers and may damage the starter mechanism.
Important Adjustments
WARNING
To reduce the risk of personal injury from loss of control or contact with the turning drilling tool, do not use your unit withincorrectidleadjustment.Atcorrect idle speed, the drilling tool should not move. For directions on how to adjust idle speed, see the appropriate section of your instruction manual.
If you cannot set the correct idle speed, have your STIHL dealer check your power tool and make proper adjustments and repairs.
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During Operation
Holding and Controlling the Power Tool
Always hold the unit firmly with both hands on the handles while you are working. Wrap your fingers and thumbs around the handles.
Keep your hands in this position to have your power drill under control at all times.
Drilling Planting Holes
8
Drilling Holes in Wood
WARNING
Do not overreach. Keep proper footing and balance at all times. Special care mustbetakeninslipperyconditions(wet ground, snow, ice) and in difficult, overgrown terrain. Watch for hidden obstacles such as tree stumps, roots and ditches to avoid stumbling. For better footing, clear away fallen branches, scrub and cuttings. Be extremely cautious when working on slopes or uneven ground or when workingwithaniceaugerattachmenton ice.
WARNING
To reduce the risk of injury from loss of control,never workon aladder,in atree or any other insecure support. Never hold the machine above shoulder height.
WARNING
Never work in a tree unless you have received specific, professional training for such work, are properly secured (suchastackleandharnesssystemora lift bucket), have both hands free for operating the power tool in a cramped environment.
Working Conditions
Operate and start your power tool only outdoors in a well ventilated area. Operate it under good visibility and daylight conditions only. Work carefully.
WARNING
As soon as the engine is running, this product gen- erates toxic exhaust
fumes containing chemi- cals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respira- tory problems, cancer, birth defects, or other reproductive harm. Some of the gases (e.g. carbon monoxide) may be color- less and odorless. To reduce the risk of serious or fatal injury / illness from inhaling toxic fumes, never run the machine indoors or in poorly venti- lated locations.
WARNING
Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction.
Substantial or repeated inhalation of dustandotherairbornecontaminants,in particular those with a smaller particle size, may cause respiratory or other illnesses. Control dust at the source where possible. Use good work practices, such as operating the unit so that the wind or operating process
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directsanydustraisedbythepowertool away from the operator. Follow the recommendations of EPA / OSHA / NIOSH and occupational and trade associations with respect to dust ("particulate matter"). When the inhalation of dust cannot be substantially controlled, i.e., kept at or neartheambient(background)level,the operator and any bystanders should wear a respirator approved by NIOSH / MSHA for the type of dust encountered.
Striking something hard in the earth (or a hard object in wood), such as
a rock or gravel, may cause the drilling tool to slow down suddenly or stop. In such a situation, some or all of the rota- tional force (reactive force) is transferred to the powerhead of the power drill, which can cause the control handle power- head and assist-handle to rotate suddenly in a counterclockwise direction.
WARNING
Work carefully in rocky ground or where other solid objects may be present. Keep throttle feed pressure to a minimum. If you feel or hear the drilling tool strike a solid object, release the throttle trigger immediately and remove the object before drilling is continued. When drilling in heavy clay soil, bore about 1/3 way and remove the auger from the hole. Clean off auger then continue in slow steps frequently clearing drill.
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WARNING
Youshouldholdyourpowerdrillfirmlyto control sudden jolts and reactive forces. Be prepared to release the throttle completely if the forces become too great. If reactive forces are not controlled, rotation of the handles may result in severe jerking and loss of control and may cause the powerhead or assist handle to strike you or throw you to the ground.
If the auger becomes trapped in the drillhole, turn off the engine immediately andremoveasdescriptedinthechapter entitled "Releasing a Trapped Auger."
DANGER
Contact with electrical cables or wires can
cause serious injury or
death as a result of elec- trical shock. This unit is not insulated.
WARNING
To reduce the risk of electrocution and damage to property, always be alert for underground pipes and cables and for overhead wires. Before drilling, obtain the necessary plans and permits.
Contact your local utility company or your locator service, such as "Miss Utility" or "One Call", for information as to cable and pipe locations. Where necessary, confirm actual location by use of devices such as cable detectors and / or by carefully dug trenches. Stay clear of overhead electrical wires when backingthedrillingtool outofthehole.If
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any portion of the machine strikes a wire, it will cause electrical shock or death.
WARNING
Before working with an ice auger attachment on frozen ponds, lakes or streams,checkwithlocalauthoritiesand takeallnecessaryprecautionstoensure safe ice thickness.
WARNING
Thrown objects may ricochet and strike the operator.
Operating Instructions
WARNING
Donotoperateyourpowertoolusingthe starting throttle lock, as you do not have control of the engine speed.
In the event of an emergency, switch off the engine immediately – move the stop switch to 0 or STOP.
WARNING
When taking the drilling tool out of the hole, lift the machine vertically so that the tool comes out straight without canting. To minimize splashing when drilling ice holes, back off the throttle when the drilling tool breaks through the ice. Raise the unit slowly. Cover and clearly mark boreholes to prevent anyone from stepping in a hole.
WARNING
To reduce the risk of injury from contact with the drilling tool, always switch off the engine and put the gear in the
9
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neutral position N before changing a drilling tool. For specific instructions to change the drilling tool see the chapter "Fitting the Drilling Tool."
WARNING
To reduce the risk of injury, never touch a drilling tool or drilling spindle with your hand or any part of your body. It continues to rotate for a short period after the throttle lever is released. Alwaysshutofftheenginebeforeputting the machine down.
WARNING
Drilling tool blades and point are sharp. To reduce the risk of cut injuries, use caution when operating and handling.
MAINTENANCE, REPAIR AND STORING
Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny coverage.
WARNING
Use only identical STIHL replacement partsformaintenanceandrepair.Useof non-STIHL parts may cause serious or fatal injury.
10
Strictly follow the maintenance and repair instructions in the appropriate section of your instruction manual.
Please refer to the maintenance chart in this manual.
WARNING
Always stop the engine and turn the gear into the neutral position N before doinganymaintenanceorrepairworkor cleaning the power tool.
WARNING
Do not attempt any maintenance or repair work not described in your instruction manual. Have such work performed by your STIHL servicing dealer only.
WARNING
Never test the ignition system with the spark plug boot removed from the spark plugorwitharemovedsparkplug,since uncontained sparking may cause a fire.
WARNING
Use the specified spark plug and make sure it and the ignition lead are always clean and in good condition. Always press spark plug boot snugly onto spark plugterminal ofthepropersize.(Note:If terminal has detachable SAE adapter nut, it must be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.
WARNING
Check conditionofdrillingtoolatregular short intervals. If behavior of tool changes, check immediately for tightness or any signs of cracks in particular.
WARNING
Wear gloves when handling or performingmaintenanceonuseddrilling tools or augers.
WARNING
Replace damaged drilling tools immediately, even if the have only superficial cracks. Never attempt to repair damaged drilling tools.
WARNING
Do not operate your power tool if the mufflerisdamaged,missingormodified. An improperly maintained muffler will increasetheriskoffireandhearingloss. Your muffler is equipped with a sparkarresting screen to reduce the risk of fire; never operate your power tool if the screen is missing, damaged or clogged. Remember that the risk of a brush or forest fire is greater in hot or dry weather.
In California, it is a violation of § 4442 or § 4443 of the Public Resources Code to use or operate gasoline-powered tools on forest-covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a complying spark arrester that is maintained in effective working order. The owner/operator of this product is responsible for properly maintaining the
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spark arrester. Other states or governmentalentities/agencies,suchas the U.S. Forest Service, may have similar requirements. Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements.
Tightenallnuts,boltsandscrewsexcept the carburetor adjustment screws after each use.
For any maintenance of the emission control system please refer to the maintenance chart and to the limited warranty statement near the end of the instruction manual.
Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine.
Storeyourpowertoolinadryandlocked location out of reach of children. Before storing for longer than a few days, always empty the fuel tank (see chapter "Storing the Machine" in the instruction manual).
Mounting the Handles
Assist handle for wood drill
Beforemountinganewassisthandlefor the first time:
1
2
421BA003 KN
NHold the handle (1) by the clamp and turn it clockwise until the gap (2) is completely closed.
This breaks the small plastic retainer in the clamp and allows the clamp to be opened up.
Normal mounting procedure
NHold the clamp firmly and unscrew the handle counterclockwise.
English
421BA036 KN
N Open up the clamp slightly.
NPushthehandleoverthechuckuntil it butts against the machine – the clamp must engage the groove on the gearbox housing.
421BA005 KN
NScrew the handle into clamp clockwise.
NMove the handle to the required position and tighten it down firmly.
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Assist handle for planting auger
3
3
4
421BA037 KN
NLoosen the two wing screws (3) on the flange (4).
NMake sure the polymer bushing is properly seated (see arrow).
5 
421BA007 KN
NPush the flange onto the machine as far as stop and line it up.
NInsert the handle tube (5) in the flange.
NMove the handle to the required position and tighten down the two wing screws firmly.
Using the Unit
Your power drill can be used for a range of applications, e.g. fence-building and carpentry (kit for wood drill) and in landscaping and gardening (kit for planting hole auger).
General
WARNING
To change the drilling tool, always shut off the engine and set the rotary knob to N.
Always fit the assist handle specified for the drilling tool you intend to use. See "Mounting the Handles".
WARNING
During operation, always hold the machine firmly with both hands to control unexpected reactive forces caused by the drilling tool jamming in or passing through the material.
Working with the planting hole auger
421BA002 KN |
NMake sure you have a safe and secure footing.
WARNING
During operation, always hold the machine firmly with both hands to control unexpected reactive forces that may occur if the drilling tool jams, e.g. in rocky ground. Release the throttle trigger if the drilling tool jams.
The planting hole auger should be operated only with the gearbox set to position 1. The tool speed is too high for drilling planting holes when the gearbox is set to poistion 2.
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Working with a wood drill or twist drill
421BA009 KN |
NMake sure you have a safe and secure footing.
WARNING
During operation, always hold the machine firmly with both hands to control unexpected reactive forces caused by the drilling tool jamming in or passing through the wood. Release the throttle trigger if the drilling tool jams.
Drilling tool jammed
See "Releasing a Trapped Auger".
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Fuel
This engine is certified to operate on unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of highquality gasoline and two-stroke air cooled engine oil.
Usemid-gradeunleadedgasolinewitha minimum octane rating of 89 ((R+M)/2) and no more than 10% ethanol content.
Fuel with a lower octane rating may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine.
The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines,etc.),butmagnesiumcastingsand catalytic converters as well. This could cause running problems or even damage the engine. For this reason STIHL recommends that you use only high-quality unleaded gasoline!
Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines and should not be used.
The ethanol content in gasoline affects engine running speed – it may be necessary to readjust the carburetor if you use fuels with various ethanol contents.
WARNING
To reduce the risk of personal injury from loss of control and/or contact with the running cutting tool, do not use your
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unit with incorrect idle adjustment. At correct idle speed, the cutting tool should not move.
Ifyourpowertoolshowsanincorrectidle adjustment, have your STIHL dealer check your power tool and make proper adjustments and repairs.
The idle speed and maximum speed of the engine change if you switch from a fuel with a certain ethanol content to another fuel with a much higher or lower ethanol content.
This problem can be avoided by always using fuel with the same ethanol content.
Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines.
WerecommendSTIHLHPUltra2-Cycle Engine Oil since it is specially formulated for use in STIHL engines.
Do not use BIA or TCW rated (twostroke water cooled) mix oils or other mixoilsthatstatetheyareforuseinboth water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.).
WARNING
Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the container from your vehicle and place the containeronthegroundbeforefilling.To reduce the risk of sparks from static discharge and resulting fire and/or explosion, do not fill fuel containers that are sitting in or on a vehicle or trailer.
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English
The container should be kept tightly closed in order to limit the amount of moisture that gets into the mixture.
The machine‘s fuel tank should be cleaned as necessary.
Fuel mix ages
Only mix sufficient fuel for a few days work, not to exceed 30 days of storage. Store in approved fuel-containers only. When mixing, pour oil into the container first, and then add gasoline. Close the container and shake it vigorously by hand to ensure proper mixing of the oil with the fuel.
Gaso- |
Oil (STIHL 50:1 or equiva- |
line |
lent high-quality oils) |
US gal. |
US fl.oz. |
12.6
2 1/2 |
6.4 |
512.8
Dispose of empty mixing-oil containers only at authorized disposal locations.
Fueling
Preparations
WARNING
In order to reduce the risk of fire and personalinjuryfromescaping gasvapor and fumes, remove the fuel filler cap carefully so as to allow any pressure build-up in the tank to release slowly
Filler cap markings
547BA009 KN
NBefore fueling, clean the filler cap andtheareaaroundittoensurethat no dirt falls into the tank.
Always thoroughly shake the mixture in the canister before fueling your machine.
NPosition the machine so that the filler cap is facing up.
Filler caps and fuel tanks may be marked in different ways.
Dependingontheversion,yourunitmay be equipped with a filler cap and fuel tank with or without symbols.
|
001BA240 KN |
Left: |
Filler cap without symbols. |
Right: |
Filler cap with markings and |
|
symbols on cap and tank. |
14 |
BT 45 |
Filler cap without symbols
Opening |
001BA218 KN |
N Raise handle.
001BA219 KN |
NTwist filler cap counterclockwise (approx. 1/4 turn).
001BA224 KN |
N Remove the filler cap.
Refueling
Take care not to spill fuel while fueling and do not overfill the tank – leave approx. 1/2" (13 mm) air space.
Closing
001BA220 KN
Handle is in an upright position:
NInsert the cap – positioning marks onthecapandthefueltankopening must line up.
NThe cap should drop fully into the opening in this position.
001BA221 KN |
NPush the filler cap down and twist it clockwise until it engages.
001BA222 KN |
N Flip the handle down.
English
Checking for proper closure
001BA223 KN |
NThe lug on the grip must engage entirely in the recess (arrow), and the grip must lie completely flush with the top of the cap.
001BA225 KN
NGrip the cap and check for tightness.
NIf the cap can be moved, it is not properly installed.
Misalignment of the cap parts
NIfthecapdoesnotdropfullyintothe openingwhenthepositioningmarks line up and/or if the cap does not tighten properly when twisted, the base of the cap may be rotated out of position vis-à-vis the top.
NSuch misalignment can result from handling, cleaning or an improper attempt at tightening.
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English |
001BA227 KN |
Left: |
Base of improperly aligned |
|
cap (with open space) |
Right: |
Base of cap correctly posi- |
|
tioned for installation |
001BA226 KN |
NTo correct a misalignment, turn the cap (with the grip up) until it drops fully into the tank opening.
NTwist the cap counterclockwise as far as it will go (approx. 1/4 turn) – thiswilltwistthebaseofthecapinto the correct position.
NTwist the cap clockwise, closing it normally – see the sections "Closing" and "Checking for proper closure."
NIf your cap still does not tighten properly, it may be damaged or broken; immediately stop use of the unit and take it to your authorized STIHL dealer for repair.
Filler cap with markings and symbols
Opening
001BA236 KN
N Raise handle.
001BA232 KN
NTwist filler cap counterclockwise (approx. 1/4 turn).
001BA234 KN
Markings on filler cap and housing must align.
001BA237 KN
N Remove the filler cap.
Refueling
Take care not to spill fuel while fueling and do not overfill the tank – leave approx. 1/2" (13 mm) air space.
Closing
001BA234 KN
Handle is in an upright position:
NPositionfillercap–markingsonfiller cap and housing must align.
NPush the filler cap down as far as it will go.
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BT 45 |
English
001BA233 KN
NPush the filler cap down and twist it clockwise until it engages.
001BA231 KN
Then the markings on filler cap and housing will align.
001BA235 KN
N Flip the handle down.
001BA241 KN
Filler cap is now closed.
If the filler cap will not engage into the tank housing
The base of the filler cap is rotated in relation to the upper part.
NLook at the black alignment marks on the top of the filler cap.
|
1 |
|
001BA238KN |
Left: |
Base of filler cap is rotated – |
|
interiormarking(1)isaligned |
|
with the exterior marking. |
Right: |
Base of filler cap is in the cor- |
|
rect position – interior |
|
marking is below the clip. It |
|
does not align with the exte- |
|
rior marking. |
001BA239 KN
NWith the filler cap in the filling neck, twist it counterclockwise until it drops into its seat.
NContinue to twist the filler cap counterclockwise (approx. 1/4 turn)
– this will twist the base of the cap into the correct position.
NWhile pushing down on the cap, twist the filler cap clockwise and close it – see section "Closing."
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17 |
English
Gearbox
421BA017 KN
The power drill is equipped with a change-speed gearbox. Depending on theapplicationandthedrillingtoolused, the speed can be adjusted to suit requirements.
Knob positions
NOTICE
The position of the rotary knob may be changed only when the engine is running at idle speed – the drilling spindle must be stationary. It may be necessary to turn the drilling spindle slightly before the rotary knob can be moved to the required position.
WARNING
Do not change the position of the rotary knob while the engine is running above idle speed – the drilling tool rotates.
NNeutral: Gearbox in neutral for starting, adjusting the carburetor and changing the drilling tool.
1Low-speed clockwise rotation, see "Specifications"
2High-speed clockwise rotation, see "Specifications"
RCounterclockwise rotation, e.g. for releasing a trapped drilling tool
Fitting the Auger
NWith the engine stopped (knob in N position), place the machine on the ground and make sure it is secure.
Chuck for wood drills or twist drills
1 |
2 |
KN |
|
||
|
|
421BA018 |
NInsert the drilling tool (1) in the chuck (2) and tighten it firmly.
WARNING
When using the geared rim drill chuck (special accessory), make sure you removethechuckkeybeforestartingup.
18 |
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Adapter for planting hole auger
5 |
3 |
|
|
4 |
KN |
|
421BA039 |
|
|
|
NScrew the adapter (3) onto the drilling spindle (4).
NUse a 13mm open-end wrench to hold the spindle steady and tighten the adapter firmly with a 19mm open-end wrench.
NSecure the drilling tool (5) in the adapter.
NUse a 17mm open-end wrench to secure and release the planting hole auger.
Starting / Stopping the
Engine
421BA020 KN
NSet rotary knob to N (gearbox in neutral).
WARNING
The machine may only be started with the gearbox in neutral. If left in positions 1, 2 and R, the drilling tool may begin to rotate when the clutch engagement speed is reached. This could result in accidents or personal injury due to loss of control.
English
Starting the Engine
4
2
3 
1
421BA021 KN
NDepressthechokelever (1)andset it to
l if the engine is cold
jfor warm start – also use this posi- tion if the engine has been running but is still cold.
N Move the stop switch (2) to Fand
Nsqueeze the throttle trigger (3) and hold it there.
NPress in the starting throttle lock (4) and hold it there.
NLet go of the throttle trigger and starting throttle lock. This is the starting throttle position.
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19 |
English
5
421BA022 KN
NPress the manual fuel pump bulb (5) at least five times.
Cranking |
421BA001 KN |
NPlace the unit on the ground so that it is secure.
NPress the machine against the ground with your left hand on the engine housing.
NPull the starter grip slowly with your right hand until you feel it engage and then give it a brisk strong pull. Donotpulloutthestarterropetofull length – it might otherwise break.
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Donotletthestartergripsnapback. Guideitslowlybackintothehousing so that the starter rope can rewind properly.
When engine begins to fire
421BA023 KN
N Set choke lever to jand N continue cranking.
As soon as the engine runs
NBlip the throttle trigger – the starting throttlelockmovestothenormalrun position and the engine returns to idling speed.
Stopping the Engine
N Move the stop switch to 0.
At very low outside temperatures
NAssoonastheengineruns:Blipthe throttle trigger to disengage the startingthrottlelock–itmovestothe normal run position and the engine returns to idle speed.
NOpen throttle slightly – warm up the engine for a short period.
If engine does not start
If you did not move the choke lever quickly enough to j(warm start) after the engine began to fire, the engine is flooded.
N Set choke lever to jand
NSetthethrottletriggertothestarting throttle position.
NStart the engine by pulling the starter rope briskly – 10 to 20 pulls may be necessary.
If the engine still does not start
NRemove the spark plug – see "Spark Plug".
N Dry the spark plug.
N Open the throttle wide.
NCranktheengineseveral timeswith the starter to clear the combustion chamber.
NInstall the spark plug – see "Spark Plug".
N Move the stop switch to Fand
Nset choke lever to j– (warm start position) even if the engine is cold.
N Now start the engine.
BT 45
If fuel tank has been run completely dry and then refueled
NPress the fuel pump bulb at least five times.
N Now start the engine.
Operating Instructions
During break-in period
A factory-new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.
During Operation
After a long period of full throttle operation, allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects enginemounted components (ignition, carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the enginetocooldown.Emptythefueltank and keep the machine in a dry place, well away from sources of ignition, until you need it again. For longer out-of- service periods – see "Storing the Machine".
English
Releasing a Trapped Auger
If the auger jams in the drill hole
421BA025 KN
NLet go of the throttle trigger so that the engine returns to idling speed.
NMove rotary knob to R position (counterclockwise rotation) – it may be necessary to rotate the machine a little until the knob can be moved to the required position.
NHold the machine firmly with both hands on the handles.
N Operate the throttle trigger.
NIncrease engine speed and slowly pull the drilling tool out of the drill hole.
BT 45 |
21 |
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